烧结温度对放电等离子烧结AlCoCrFeNi2.1高熵合金性能的影响
Effects of Sintering Temperature on Properties of AlCoCrFeNi2.1 High-Entropy Alloy by Spark Plasma Sintering
摘 要
采用放电等离子烧结（SPS）技术在不同烧结温度（850，950，1 050，1 150℃）保温5 min条件下制备AlCoCrFeNi2.1高熵合金，研究了烧结温度对合金的烧结性能、物相组成、微观形貌和力学性能的影响。结果表明：随着烧结温度升高，合金表面气孔数量逐渐减少，合金相对密度增大；当烧结温度升至1 150℃时，合金颗粒间形成了良好的冶金结合；随着烧结温度升高，烧结合金的显微硬度和屈服强度均先增后降，当烧结温度为1 050℃时，烧结合金的显微硬度和屈服强度最大；烧结合金的断裂机制为沿晶断裂和穿晶断裂。
高熵合金
烧结温度
力学性能
spark plasma sintering
high-entropy alloy
sintering temperature
mechanical property
Abstract
AlCoCrFeNi2.1 high-entropy alloy was prepared by spark plasma sintering (SPS) at different sintering temperatures (850,950,1 050,1 150℃) for 5 min. The effects of sintering temperature on sintering properties, phase composition, micromorphology, mechanical properties of the alloy were studied. The results show that with sintering temperature increasing, the amount of pores on the surface of the alloy decreased and the relative density of the alloy increased. When the sintering temperature rose to 1 150℃, good metallurgic bonding was formed between the alloy particles. With the increase of sintering temperature, the microhardness and yield strength of the sintered alloy increased first and then decreased. When the sintering temperature was 1 050℃,the microhardness and yield strength of the sintered alloy were the highest. The fracture mechanism of the sintered alloy was intergranular fracture and transgranular fracture.
中图分类号 TG146 DOI 10.11973/jxgccl201907007
所属栏目 材料性能及应用
基金项目
收稿日期 2018/7/6
修改稿日期 2019/5/23
网络出版日期
作者单位点击查看
备注姚瑞敏(1982-),女,山西长治人,讲师,硕士
引用该论文: YAO Ruimin,ZHENG Liuwei. Effects of Sintering Temperature on Properties of AlCoCrFeNi2.1 High-Entropy Alloy by Spark Plasma Sintering[J]. Materials for mechancial engineering, 2019, 43(7): 28～32
姚瑞敏,郑留伟. 烧结温度对放电等离子烧结AlCoCrFeNi2.1高熵合金性能的影响[J]. 机械工程材料, 2019, 43(7): 28～32
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